Links to web pages with helpful tutoring material.
| Subject | Description |
| Most Used | |
| Harold's Cheat Sheets | My cheat sheets on Toomey.org/tutor created after giving the same lesson over and over again |
| WolframAlpha.com | Computational Knowledge Engine for STEM. aka The Google of Mathematics. |
| Desmos | Free Graphing WebApp |
| Mathway | Calculus problem solver from Chegg. It costs $9.99 / month though. |
| Wyzant Online Lesson Tool | Wyzant online lesson tool with whiteboards and a code editor. Used instead of Zoom. |
| AP | Advanced Placement (AP) |
| AP Practice Exams | APCentral.CollegeBoard.com practice AP Exams |
| AP Exam Schedule | 2014 Exam Dates |
| ACT | American College Testing (ACT) |
| ACT Test Taking Tips - Math | ACTStudent.org - Content Covered by the ACT Mathematics Test |
| ACT Practice Tests - Math & Science | ACTStudent.org - ACT Test Prep - Sample Tests |
| ACT Test Prep and Practice Exams | TestPrepReview.com - ACT Test Preparation and Lots of Exams |
| ACT Practice Test - Science | TestPrepReview.com - ACT Practice Questions - Science |
| ACT Sample Questions | ACT.org - ACT's COMPASS System Mathematics Sample Questions |
| ACT Practice Test - Math | ACTExamPracticeTests.com - ACT 20 Practice Questions - Math |
| ACT Practice Tests - Math, Science, English | 4Tests.com - Free, Practice ACT Exam |
| SAT | SAT Reasoning Test (formerly Scholastic Aptitude Test) |
| Official SAT® Practice Test | CollegeBoard |
| SAT Online Practice Exams #1 | The OnLine Test Page 100% Free (SAT) |
| SAT Online Practice Exams #2 | ProProfs Free Online Practice Questions for the SAT |
| GED | General Educational Development (GED) |
| GED Practice Exams | Test Prep Review Exam Practice for GED |
| ASVAB | Armed Services Vocational Aptitude Battery (ASVAB) |
| ASVAB Test Practice Questions | Help your ASVAB Exam Score with free ASVAB Test Preparation |
| FREE ASVAB Test Preparation | Short and Full-length Practice Tests, Study Guide and Tips |
| TAKS | Texas Assessment of Knowledge and Skills (TAKS) |
| Released TAKS Items - Fall 2008 | Texas Education Agency - Most recent exam |
| Released TAKS Tests 2002, 2003, 2005, 2008 | Texas Education Agency - Past exams |
| Released Tests, Answer Keys, and Scoring Guides | Texas Education Agency - TAKS home page |
| THEA (TSI) | Texas Higher Education Assessment (THEA) |
| THEA for Collin College TSI Exam | Texas Higher Education Assessment THEA home page |
| THEA for Collin College - TSI Math Exam | Texas Higher Education Assessment - Math exam |
| GRE | Graduate Record Examination (GRE) |
| GRE Home Page | GRE Home Page |
| GRE Practice Exams - Mathematics | GRE Test Prep Review and Practive Exam |
| GRE Practice Test Resources | Free GRE Practive Test Resources, including tips and a diagnostic quiz |
| C/C++ | |
| Book: C Programming Language (2nd Edition) | The definitive book on the C language written by the creators of C |
| Numerical Analysis Algorithms in C | A complete set of C programs and documentation that I wrote for the book Numerical Analysis, 4th Edition, by Burden & Faires |
| General Computer | |
| Personal Computer | Personal computer - Wikipedia, the free encyclopedia |
| Computer Networking | |
| Computer Network Overview | Computer network - Wikipedia, the free encyclopedia |
| Dictionary of Network Terminology | About.com - Networking for Beginners - Dictionary of Network Terminology |
| Chess | |
| Learn How to Play Chess: Rules & Basic Strategies | Chess 101 |
| Chess Wizard - Beginner | Beginner Chess Puzzles |
| Chess Wizard - Intermediate | Intermediate Chess Puzzles |
| Chess Wizard - Advanced | Advanced Chess Puzzles |
| Expert-Chess-Strategies.com | All things chess |
| Chess Game Strategies - Mate In One | Chess Puzzles - Mate in One |
| Chess Game Strategies - Mate In Two | Chess Puzzles - Mate in Two |
| Physics | |
| Wikipedia - Equations of Motion | The first big formulas encountered by physics students |
| Math | |
| Wikipedia.org | The Free Encyclopedia that anyone can edit |
| Elementary Calculus | Elementary Calculus by Vias.org |
| Precalculus - Conics | Determining Conic Sections by Inspection |
| Discrete Math | |
| Discrete Math | The Math Forum - Math Library - Discrete Math |
| TI-84 Calculator | |
| Calculator Tutorials for the TI-83/TI-84 | Calculator Tutorials for the TI-83/TI-84 by John LaPrise |
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Last updated 15 October 2025